Drawing and flattening sheet glass



Aprilizl, 1925.-

c.vw. Bl-:gngN ET AL DRAWING AND FLATTENING SHEET GLASS 'Filed sept. 5, 1922 2 sheets-snee@ 1 w Hlm @E w www m\ E M Y@ www W s ww/ Aprl'zl, 19,25. Y, 1,534,567

' l c. w. BELDEN ET AL DRAWING AND .FLATTENING SHEET' GLASS Filed sept. 5, 1922 2 Sheets-Sheet 2 ff ff/wo f, v

5y Y NW@ e w e *e fm @we A a WL sistemi, `stire'iitfiisest, toe'ismiis., sito tite-113e. e. Bosses, ois CHARLES- @satisfies emisisiiitiite seme@ Gia-Ass; iimiiieammiiee eepiem; s, 1922.. semi No. bssis.

To @ZZ wiz/0m i1 may eoiiffem: appii'ezil to the roof structure ciiieetiy oifei- .Be it i/:iiojif'ii that Wmimifs U. hanging; the rst horizontal runfef the. sheet. E@ miti LNGLE it Erisiiizii, Citiizeiis oit the United Fist 2 'shows e simiisi structure inyohin'g States, residing, res-peet. "eij: :it Sihiet/epeit5 o` different.arrangement .of the {ire-box, f if the parishV et Cadiio and State of Figs. 3 aiidet show two'di'ereiit forms of Lomisiaiizij and Chariestoti, in the county of appziietiis wherein the heatis eiipiiedto the i Kanawha zuid State of "Q'V'est 'Vi ginie,- heve iippei side of the radiating member miti 'iii'veiteti new :iwi useful 'iiipioveiiients in transmitted therethrough to the-sheet.

Bi's'winsj sind Fhitteiiiiig Sheet et Although this iifiventio'nAm with perhaps 0 Whieh the toile-Wing is a s iiieatimi. [some slight iearrziiigeiiieiit of part-s, might This )'eiitioii reiates to'ho mst t iy dimv! he sppiieii to my sheet (ii'awiiig system, it is v ing sbs, @fi-ass, anti mote peltieiiiiii i.' yto en here' shown, andis pfuftioiiiaily,adapted for' G5 "ai'otfec method eiiciepparntiis im; 'relientA use with, the' Coihum `system of drawing;

pni'ntioii im: the fsheet giziss, which is substantially set o'rth 5 flatteningopeiiitio y in the patentto' i.' fw. Colburn, .1,248,809, The ohfeet is to 'provith un nt'vgi'pnietus iii ygfi'anteti Dee.- f, En this system the which 'the drawn shes, i ifiii'ectiv, sheet oit glass i, is di'twiiiiip i'oiii'the iiioiten' ii'ig, the Cirami she fit has heen 'found thitt 'when heat-'met isiiiies ijfiiie'ei` part of the molten giassin izeeeptacle A meeppiied `iii'eetiy 'to the sheet, their @Heet Edge-ioiiiiing roiiei's 6 are usednftor'etaiii i5 eeioss the Width oit the .sheet isy .iiot-siii'ziys the Width of the sheet. Sheet lis drawn iipi, 'entirely i weer and continuous, i seriesnoi and then-heut into the horizonta'i piene over" leioseiif adjacent 'Flames must he used', Whi'ehy the Cooled bending` roliieif, passing thereoiiiy 'approximates @s coiitiiiioiis sheet of i'oiii over supporting; roiiei's 8 ,and 95 into timide; and Varying pressure in the ,ons humthe ch'awiiijHandv Hntteiiine mechanism inmi @yg gauge these iztiiies to, Y? y somewhat iii' (iieiiteti nt' 1.0. Cooie'rll beneath the bendiiitensity and Liiiectioii. Thistziii results iiil` ingr'ioiiei 7 serves to e'ooithe roller surface 211i" soiiiewhzit (iieient fiegfitefs @if heizt heiiig; andthe iiiitiei'f hice oi 'the sheet to prevent 'applied to diifei'ent wens ot lthe sheet7 which sticking ofvr these 'parte Ichiring the bending undesiifzihie and. fiiot conducive to n fpei process. All o't' the shove is oid iii the Col- S5` feet 'ietteiiiiig of the sheet; By 'the present hui'ii process fis referred to in the patent invention theheetiiif iiuinos m7e-net-1zimiiieti' noteci'` shove. i y

' directiyto thesheet but .site directed,against The sheet 'l is stili somewhat plastic at the `mi approximeteiy eoiitini'ions" smitnee' lof 'time itv is bent around-the foil 7, hut it has radiating material positioned sdjlzi'eentthe cooled ziiid setk-.tohsueh im extent'that it is 90 patii'of the'riioving sheet so that this siiiffziee zipt to ret/siii insome degree v.the curvature Yheeomes quite eeniy heated. Th'efsheet Iis impm'tecijhy' the ioiei, :md'the sheet will be 4@ heated, hy radiation; from this hot-siiifiiee,iiioi-e oi" less ooiiiigated. To prevent this,

y which impziitss steady oven Afiom heft ,ing and to remove' any other curves or Waipsge @equally end coiistantiyeii' pas fof the sheet.' iii the sheetg the' sheet is reheateci after leav- 95 passing thereby. y l iup; the bending i'oii T, and the corrugatiois Seveifai itiieieiit oiriiisi faiipe h "will he pmtifiilysti'etchedvout duriiig the 45 oeiyiig'oiitthe pyiiieiifiies otthis-invs passage lfrom voli 7 to the drawing mechaere diseiosei. iii the ,sccoieipaiiyiiig draw. l L 4 iiism, uid will he eiitiieiy removed when the emi/"the objects anni .advantages of theI 'sheet ziiiowed to settle .sind ifitteii ori the ,-teiitioii Wiiibeeofiiie moire appareiitfiom iti'e fiatteiiing tabie 10. is essentizil that' this "ioiiowing -detaiieii .iieseiiptioii of those ieh'entiiig he eppiieu Aveniy and steadiiy 59' lciiiieieit moiiieatioiis., f y to iii portions of the-sheet'to secure the best Y.

'in' the aeeompai'iyiiig timwingsz" results iii the iizittening process. It has been A Figui. shew/s e, veitiejii see" l sie form of' :meehsmism W'ieteiiithe-heets Haines, or heeteggases, directly against the oii' tiiough the pre-@tice `i'iiA vthe past to direct heating 05 i sheet surface, but'it is diiicult to obtainv an even sheet of flame of equalinteiisity across the entire glass sheet, also the gas pressure is not always steady, allowing the flames to vary somewhat in direction andl intensity.

Referring now more particularly to- Fig.l 1, it will be notedthat the roof or cover member'12 above the first part of Ythe horizontal run 'of the sheet is formed With a practically flat and continuous -lowe'r surface 13, positioned rather close to, and substantially parallel with, the sheet 1f. This roof or member 12 is formed of suitable/,tiles or other material adapted to take and retain a considerable amount of heat, and act as a good radiating agent. At 14 is a fire-box heated by burners such as 1 5, the f heated gases passing out through ports and being directed against and along the surface 13. Some of the heat is reflected by this surace against the sheet 1 passing. therebeneath. Also -the roof members 12 become highly heated,`and radiate an even intenseA heat a ainst the sheet.

At 1 is shown a'pipe-burner, comprising parallel with the sheet suface, and having a .series of burner openin s o r perforations the sheet.

3 is turned down so as to to form a sheet yof ameaclross the width of When the drawing of the con- 'nuous sheet is first started, it is desirable to heat the sheet somewhat 4to facilitate the bending process, and at this time the pipeburner 17, which may be p 'artalylf1 rozated,

irec e amesl against the vertical run offthe sheet, as lindicated in dotted lines at 18. After thesheet i's siiccesstullyv started, the burner 17 is.

areaof the sheet.

turned up so as to v direct its llames against the/cover member 12, asl shown at 19 In this osition it-assists4 the l,tire-box 14m heating tllieradiating surface' 13. Q In,` Fig. 2 is shown a quite similar construction, the fire-box 20 in this form being` arranged closer to and above the sheet. This fire-box is heated by burners 21, the heated gases being directed down through ports 22, where they are deflected by the tile 23 against the surface 24 of cover members 425. In this form the surface 24 has been some'- what curved or concaved so that the heat will be concentrated on a more localized Of course 4the'pipeburner' 17 (Fig.- 1) could be used with this form' of the apparatus, and also with those subsequently to be described, 'if so desired;

In Fig. 3, the roof or'radiating surface abovethe sheet is composed of athin plate or plates 26 of carborundum or-otherheat.- transmitting material. Above these 'platesy is a' fire-box 427, havingan exit iuegat 2 .i

' The heat is transmitted or radiated throng gas-pipe positioned'ransverse to and 1 .which the sheet sheetv in of a tile 29 whose whole body is honeycombed with a series of fine perforations 30. Heated gases from the lire-box 31 pass through chamber 32l over this plate or tile 29, some of the heated gases passing through the perforations 30, audsonie through the exit iiueg33, Icontrolled by gate 34. The heat the flue or gate 34, the proportion of the gases :forced to pass through the plate 29 maybe yaried as desired. Either the plate l26 ofLF g. 3, or the plate 29 of Fig. 4 may be adjusted vertically to vary its distance --from;"and radiating effect upon, the sheet by any suitable means, here shown as removable supporting shims 35. Claims:

y1. In the process of producing sheet glass, wherein the sheet is drawn upwardly from a molten bath ofglass, bent into the horizontal plane, and then passed through a flattening mechanism, the method of reheating the sheet in its horizontal run in preparation for the flattening operation by applying heat to a substantially horizontal surface under which the,l 'sheet passe s,^the sheet being indirectly heated by heat transmitted from said surface.

2. Ina sheet glass drawing apparatus,

'horizontal plane, means for reheati of the y,sheet in its horizontal run, comprin member of heat radiating material having a` substantially horizontal lower surface un ,which the sheet moves, and asource of heat which plays on the member and" not on the ;sheet, the sheet being heated'by radiation `from the member. i

3. In 'a sheet glassLdrawing apparatus, wherein the sheet is d awn vertically from a bath of molten glass and then bent into the horizontal plane, means for reheatin the sheet inits horizontal run, comprising a member of lieat 1radiating material under oves, a'source of heat for heating this meiny er, and an auxiliary heati g means adapted to interchangeably play a aiiis't either the vertical run of the sheet r the radiating member. j! 4. I n a sheet glass drawing apparatus, Evherein 'the sheet is drawn vertically from a athof molten glass and then bent into the horizontalplane,l means for reheating the its horizontal' run, comprising a memlr 'of heat 'radiating material under ing awhich the sheet moves, a s'ouroe of heat for hea-ting this member, and a pipe-burner adapted to play its flame interchangeably against either the vertical run of the sheet or the radiating member,

5. In a rsheet glass .drawing a paratus, *wherein the Sheet 1s drawn Vertical y from a hath of molten glass and then bent into the vlimsiZontal plane, means for reheating theA sheet comprising a member of-heat radiating material under which the sheetmovesin its horizontal run, and a heating means adapted to interchangeabl-Iyly play. against either the' vertical runof t member,

6. In vasheet glass' drawing apparatus,

wherein the sheet 1s drawn vertically from a e sheet or the radiating bath of molten glass and then'bent into the horlzontal lane, means f for reheating the sheetcomprising a member of heat radiating material under which the sheet moves in its horizontal run, and a pipe burner adapted to .play itsA flame interchangeably against l ether the Vertical run of the sheet or the radiatm member.'

Si e at Shreveport, inthe parish of Cad 0,"and State of Louisiana, this 23 day.

of August, 1922.

CLYDE W. BELDEN. 

